<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        /*     //100的求和
            function sum(){
                let result = 0;
                for (let i =0; i <= 100;i++){
                    result = result + i;
                }
    console.log(result);
            }
            sum(); */
            function jinzita(){
            var str = '';
            for (var i = 1; i < 10; i++) {
                for (var j = 1 ; j <= i ; j++){
                    str = str + ( i + '*' + j + '=' + i * j  + ' ');
                }
                str += '\n';
            }
            alert(str)
            }
            jinzita(); // 调用上面的
        </script>
</body>
</html>